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  1. Title: Map of the United States' lead mines on the upper Mississippi River

    Contributors:

    Summary: 5084 and 5160;Covers southwestern Wisconsin and northwestern Illinois.;Duplicate copy (facsimile), detached from Wisconsin Historical Collections 11 (1888) between p. 400-401 [F902.981 v. 11], and shelved as map2FoG4122.S68H2 1829 C45 1888.; 4102.N61H2 1829 C45;MMC 6-2092 and 6-2095.;1 map, hand colored;38 x 45 cm.

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  2. Title: Superimposed magnetic on gravity anomaly map of southwest Minnesota, M-122

    Contributors:

    Summary: Gravity (interpretation of gravity data collected with ground based meters indicating differences in rock density of rocks in the upper crust) and magnetic anomaly (interpretation of magnetic data collected from airborne surveys, the map contours (lines of equal magnetic intensity) indicate the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth) map of southwestern Minnesota, scale 1:250,000.

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  3. Title: Superimposed magnetic on gravity anomaly map of the Duluth Complex and related rocks, northeastern Minnesota, M-120

    Contributors:

    Summary: Gravity (interpretation of gravity data collected with ground based meters indicating differences in rock density of rocks in the upper crust) and magnetic anomaly (interpretation of magnetic data collected from airborne surveys, the map contours (lines of equal magnetic intensity) indicate the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth) map of the Duluth complex and related rocks, scale 1:200,000.

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  4. Title: Superimposed magnetic on gravity anomaly map of the Central Duluth Complex and western part of the Beaver Bay Complex, Lake and St Louis Counties, Minnesota, M-117

    Contributors:

    Summary: Gravity (interpretation of gravity data collected with ground based meters indicating differences in rock density of rocks in the upper crust) and magnetic anomaly (interpretation of magnetic data collected from airborne surveys, the map contours (lines of equal magnetic intensity) indicate the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth) map of the central Duluth complex, scale 1:100,000.

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  5. Title: Geologic map of the Duluth Complex and related rocks, northeastern Minnesota, M-119, Plate 1

    Contributors:

    Summary: Compilation of interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the Duluth Complex, scale, 1:200,000; 1:500,000.

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  6. Title: Geologic map of the Duluth Complex and related rocks, northeastern Minnesota, M-119, Plate 2

    Contributors:

    Summary: Generalized bedrock geology, aeromagnetic data, data base information, scale 1:500,000.

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  7. Title: Geologic atlas of Pine County, Minnesota, C-13, Part A, Plate 3, Supplemental Bedrock Mapping

    Contributors:

    Summary: Total magnetic intensity anomaly (relative to the earth's magnetic field), color coded. Interpretation of magnetic data collected from airborne surveys, the map colors indicate the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth and associated detailed geologic interpretations of selected areas, scale 1:24,000; 1:300,000, Pine County.

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  8. Title: Bedrock geologic map of northwestern Minnesota, M-92

    Contributors:

    Summary: Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of northwestern Minnesota, scale 1:200,000.

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  9. Title: Bedrock geologic map of the central Duluth Complex and the western part of the Beaver Bay Complex Lake and St Louis Counties, Minnesota, M-101

    Contributors:

    Summary: Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of part of the Duluth Complex, scale 1:100,000.

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  10. Title: Bedrock geologic map of northwestern Minnesota, M-80

    Contributors:

    Summary: Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of northwestern Minnesota, scale 1:250,000.

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  11. Title: Geologic map of the Doyle Lake and Finland quadrangles, Lake County, Minnesota, M-72

    Contributors:

    Summary: Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the Doyle Lake and Finland quadrangles, scale 1:24,000.

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  12. Title: Aeromagnetic anomaly map of Minnesota, S-17

    Contributors:

    Summary: Aeromagnetic anomaly (total magnetic intensity anomaly (relative to the earth's magnetic field, interpretation of magnetic data collected from airborne surveys, the map colors indicate the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth) map of Minnesota, scale 1:500,000.

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  13. Title: Bouguer gravity anomaly map of Minnesota, S-16

    Contributors:

    Summary: Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between an observed gravity measurement and value predicted from a generalized earth model), shown as contour lines (isolines) of equal value, map of Minnesota, scale 1:500,000.

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  14. Title: Aeromagnetic map of Minnesota, southeastern region, Plate 2

    Contributors:

    Summary: Total magnetic intensity anomaly, contour, scale 1:250,000. Interpretation of magnetic data collected from airborne surveys, the map contours (lines of equal magnetic intensity) indicate the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth.

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  15. Title: Aeromagnetic map of Minnesota, southeastern region, Plate 1

    Contributors:

    Summary: Total magnetic intensity anomaly (relative to the earth's magnetic field), color coded, scale 1:250,000. Interpretation of magnetic data collected from airborne surveys, the map colors indicate the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth.

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  16. Title: Shaded-relief aeromagnetic anomaly maps of Minnesota, S-18

    Contributors:

    Summary: Shaded-relief, (pseudo 3d), black and white map of Aeromagnetic anomaly (total magnetic intensity anomaly (relative to the earth's magnetic field, interpretation of magnetic data collected from airborne surveys, the map colors indicate the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth) in Minnesota, scale 1:1,000,000.

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  17. Title: Bedrock geology of the Cook-Side Lake area, St Louis and Itasca Counties, Minnesota, M-75

    Contributors:

    Summary: Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments), Cook-Side Lake area, scale 1:48,000.

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  18. Title: Aeromagnetic map of Minnesota, southwestern region, Plate 2

    Contributors:

    Summary: Total magnetic intensity anomaly, contour, scale 1:250,000. Interpretation of magnetic data collected from airborne surveys, the map contours (lines of equal magnetic intensity) indicate the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth.

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  19. Title: Aeromagnetic map of Minnesota, northwestern region, Plate 2

    Contributors:

    Summary: Total magnetic intensity anomaly, contour, scale 1:250,000. Interpretation of magnetic data collected from airborne surveys, the map contours (lines of equal magnetic intensity) indicate the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth.

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  20. Title: Aeromagnetic map of Minnesota, northwestern region, Plate 1

    Contributors:

    Summary: Total magnetic intensity anomaly (relative to the earth's magnetic field), color coded, scale 1:250,000. Interpretation of magnetic data collected from airborne surveys, the map colors indicate the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth.

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